Thawing-point.



PATENTED JUNE 11, 1907.

H mm Na M w/TNESSES 3.65/i gym/r ATTORNEYS JOB H. LAMLEY, OF TACOMA,VASHINGKON.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed February 14,1907. Serial No. 357,296.

T0 rif/ZZ who/1t 'llt 'nar/,y coll/cern:

Be it known that l, JOB H. LAMLEY, a citi- Zen of the United States, anda resident or Tacoma, in the county oi' Pierce and State of Vashington,have invented a new and lmproved Thawing-Point, of which the followingis a full, clear, and exact description.

This invention relates to thawing points, such as are used in placermining for gold. These points are used in frozen earth to a greatextent, and are provided with means 'for conducting steam to the forwardend or tip orP the point, which eil'ect a thawing of the ground as thepoint is driven in.

The object of this invention is to produce a thawing point of simpleconstruction, having improved means for attaching the hose to the body.

A further object of the invention is to provide an improved constructionfor the body of the point.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the ligures.

Figure 1 is a vertical central section through the thawing point and itsadjacent parts, a portion of the point and a portion of the hose beingshown in elevation; a portion of the body of the point is broken away;Fig. 2 is a front elevation of the thawing point, a portion of the bodythereof being broken away; Fig. 3 is a longitudinal section through thelower portion of the point showing a modified construction; and Fig. 4is a cross section on the line 4-4 of Fig. 1, and illustrating themanner ot attaching the hose to the point.

Referring more particularly to the parts, 1 represents the body of thepoint, which is of elongated form, and formed with a tapered tip 2 asshown. This body may be of Octagonal form, as indicated in Fig. 2, or itmay be of round or tubular form. The upper portion of the body-1 isenlarged so as to form a head 2 adapted to be struck by a maul orhammer7 and in the lower portion of this head I provide a transversetapered bore 3. The hose 4, which conducts the steam to the point, isattached to the neck 5 of a nipple 6, which nipple is formed at itsinner end into a tapered pin or plug 7, which plug is tapered to fit thebore 3, and has a threaded extremity S projecting beyond the oppositeface of the head, upon which there is mounted a nut 9 as indicated 3 thesaid nut being seated upon a washer 10. At the enlarged end ol the plug7 a laterally projecting shoulder 11 is formed which is adapted to beseated against the Al'ace of the head when the nut 9 is tightened up.Just under this shoulder 11 a dowel pin 1,2 is provided, which is seatedin an opening drilled radially into the side of the plug. The outer sideoi' the dowel thrusts against the inner face of the shoulder 11 and thedowel projects into a recess 13 which is formed in the side oi the boreto receive it. From this arrangement, when the nipple is tightened upinto position, it is locked securely against rotation. The nipple isformed with a longitudinally disposed duct 14 which extends inwardlyfrom the end of the neck 5. At about the axis of the head 2, this duct14 turns laterally so as to form a port 15 which emerges upon 'the lowerside face of the plug 7. This port is in communication with alongitudinal duct 16 which extends throughout substantially the entirelength of the body 1, emerging at the tapered point .2 thereorl asshown.

' At the inner end of the neck 5 an outwardly projecting collar 17 isformed, and

the inner end of the hose preferably abuts against the side face of thiscollar as shown. The hose is held upon the nipple by means ol a clamp1S, which consists of two oppositely disposed clamping plates 19, thebodies oi: which are curved or bent around the outer part of the hose atthe neck. These plates are formed with oppositely projecting lugs 20through which clamping bolts 21 are passed, as indicated. At their innerends, these plates 19 are formed with recesses 22 which receive thecollar 17 in suoli a way that shoulders 23 are formed on the plateswhich abut against the inner face oi the collar as shown. Freni thisarrangement, when the clamp is tightened on the nipple it becomesimpossible to dislodge it by pulling it toward the outer end of thenipple; at the same time, the hose is securely clamped. This arrangementfor securing the clamp on the nipple is advantageous, particularlybecause it prevents the hose `from pulling itself with the clamp ofi' otthe nipple such an action as this might occur from the back pressure ofthe hose where high pressures are used. In

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the head 2aL above the bore 3, I provide a transversely disposed opening24 which enables a bar to be attached to rotate the point or remove thesame when desired` Instead of making the point l entirely of one piece,I may make it of two pieces', in the manner illustrated in Fig. 3. Withthis form of point, the head 25 is extended downwardly and provided atits lower extremity with an axial bore 26 which extends upwardly andcommunicates with the duct 27 which passes downwardly to carry the steamto the point. In this bore 26 the upper extremity of a bit 28.ismounted, and this bit may be welded to the head 25. The bit is formedwith a tubular duct 29, which leads the steam from the duct 27 to thetip 30 of the point.

The dowel pin l2 and the recess 13 are so placed that when the plug isseated, the post 15 will register accurately with the duct 16 in thepoint. The manner of mounting the plug insures that a good steam-tightoint will be produced. It is evident, also, that the clamp 18 insuresthat a steam-tight oint will be made at the point where the hoseconnects with the nipple.

I-Iaving thus described my invention, I claim as new and desire tosecure by Letters Patent:

1. A thawing point having a head with a transversely disposed ltaperedbore, a nipple having a tapered plug received in said tapered bore, saidplug having an extremity projecting beyond the face of said head, meansattached to said extremity for tightening said plug in said bore, saidbore having a recess in the wall thereof, said plug having a projectionreceived in said recess and preventing the rotation thereof, and a hoseattached to said nipple, said nipple. and said point havingcommunicating ducts.

2. A thawing point having a transverse tapered bore in the upper portionthereof, a nipple having a tapered plug received 'in said bore andhaving a longitudinally disposed duct with a laterally disposed extension emerging upon the side face of said plug to form a port, said pointhaving a duct communicating withsaid port and leading to the tip of saidpoint, said plug having a shoulder seating against the face of saidpoint and having a threaded extremity projecting beyond the oppositeface thereof, a nut received on said threaded extremity and adapted toseat said plug in said bore, a dowel pin disposed under said shoulderand projecting outwardly from the side wall of said plug, said borehaving a recess in the .wall thereof receiving said dowel pin, saiddowel pin and. recess aHording means for bringing said port and saidsecond duct into alinement.

In testimony whereof I have signed myV name to this specification in thepresence of two subscribing witnesses.

JOB H. LAIILEY.

Witnesses:

J. W. A. NICHOLS, T. J. GRUBB.

